28122276 has 108 divisors (see below), whose sum is σ = 82947312. Its totient is φ = 7390656.

The previous prime is 28122271. The next prime is 28122293. The reversal of 28122276 is 67222182.

It is not an unprimeable number, because it can be changed into a prime (28122271) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 99231 + ... + 99513.

Almost surely, 2^28122276 is an apocalyptic number.

28122276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28122276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41473656).

28122276 is an abundant number, since it is smaller than the sum of its proper divisors (54825036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28122276 is a wasteful number, since it uses less digits than its factorization.

28122276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 308 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 28122276 is about 5303.0440314974. The cubic root of 28122276 is about 304.1002814361.

The spelling of 28122276 in words is "twenty-eight million, one hundred twenty-two thousand, two hundred seventy-six".